The Utsunomiya Line is the name given to a 163.5-kilometer (101.6 mi) section of the Tōhoku Main Line between Tokyo Station in Tokyo and Kuroiso Station in Nasushiobara, Tochigi, Japan. It is part of the East Japan Railway Company network.

The Tōhoku Main Line is a 575.7-kilometre-long (357.7 mi) railway line in Japan operated by the East Japan Railway Company. The line starts from Tokyo Station in Chiyoda, Tokyo and passes through such cities as Saitama, Utsunomiya, Fukushima, and Sendai, before reaching the end of the line in Morioka. The line originally extended to Aomori, but was truncated upon the extension of the Tōhoku Shinkansen beyond Morioka, which mostly parallels the Tōhoku Main Line. A portion of the Tōhoku Main Line is also shared with the Keihin–Tōhoku Line and the Saikyō Line.